思茅松人工林土壤肥力维护对策研究

Study on the Strategy of Maintain of Soil Fertility in Pinus kesiya var langbianensis Planted Forest Lands

通过对思茅松几种人工林及天然林的土壤肥力进行监测,结果发现:高密度种植思茅松人工纯林,其土壤肥力将呈下降趋势,可通过种植思茅松与西南桦的混交林以及合理施肥来维护林地土壤肥力。N肥具有显著提高土壤肥力的能力。

Through carries on the monitor to soil fertilities of several kind of planted forests and the natural forest of Pinus kesiya vat langbianensis, the result showed that： the soil fertility showed a downward tendency when the Pinus kesiya var langbianensis was planted with a high density. And the soil fertility in forest lands can be maintained by planting the mixed forest of Pinus kesiya vat langbianensis and Betula alnoides as well as applies fertilizer rationally. Nitrogen fertilizer has obviously ability to enhance the soil fertility.